Abstract:

Based on the instantaneous or the statistical channel state information, the channel capacity of a twohop relaying system was analyzed according to the different relaying methods. Taking the system capacity as the optimization criterion, an optimal power allocation scheme was proposed to distribute a certain power between the transmitter and the relay station. The numerical results show that, when compared with the uniform power allocation, the optimal power allocation can daptively adjust each hop power based on the different channel conditions, and can utilize the resources efficiently to further improve the system capacity.

Key words: non regenerative relaying, regenerative relaying, channel state information, power allocation